Chapter 12

Normal Mapping

In Chapter 7, we introduced texture mapping, which enabled us to map fine details from an image onto our triangles. However, our normal vectors are still defined at the coarser vertex level and interpolated over the triangle. In this chapter, we study a popular method for specifying surface normals at a higher resolution.

The Normal Map demo for this chapter is available in the download files.

Objectives:

image    To understand why we need normal mapping.

image    To discover how normal maps are stored.

    To learn how normal maps ...

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